Grinder salts are typically large dry crystals suitable to a salt mill or grinder. The white salt crystals are easy to grind in the mills and the lower moisture content allows the salt to flow through with little hassle. Uses: For flavoring foods at the table when the host determines that a finer, higher grade finishing salt is not required. Note: Always use a salt mill with a ceramic or plastic grinding mechanism. Metal, including stainless steel, will corrode and adversely flavor the salt.